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Number   :  2451
Date     :  2002-07-11
Author   :  Kan Yabumoto
Subject  :  XCOPY-compatibility
Size(KB) :  2



Hi, All:

Microsoft's XCOPY that comes with Windows XP (let us call
it XCOPY-XP)
has been revised.

Now, the new XCOPY-XP version made some small catch up with XXCOPY.

Here are a list of new switches (and their counterpart in XXCOPY)

XCOPY-XP XXCOPY
-------------------------------------------------------------------
/EXCLUDE:[+,...] /EX /EX
/G (default operation)
/o /SC1
/X /SC3
/Z /(new switch)


In the past, whenever Microsoft added a new switch, it collided
with XXCOPY's existing switch. For example, when XCOPY added
the /N switch, we had to rename the then /N switch to /NX.
Now, we already have the /SC1 and /SC3 switches that are equivalent
to XCOPY's new /o and /X switches, respectively.

Recently, we had to deal with the pitfall in XCOPY's filename
matching algorithm which could have easily been averted by the /NP.

When we introduced the /NP switch, we refrained ourselves from
making the default setting of the new (and improved) behavior
by the /NP switch. The whole reason for not making the improved
behavior the default was the XCOPY-compatibility. But, we
started to have question in this policy. Seriously, who on earth
benefits from the full compatibility in the /NP0 behavior
(to let the SFN name matching prevail even when LFN does not match)?

-------------------------------------------------------------------

Maybe, the time has come for our XCOPY-compatibility policy to end.
That is, we are seriously considering a "freeze" in the
XCOPY-compatibility at the current level.

The consequence of this is that the existing XXCOPY switches which
are equivalent to XCOPY's newly added switches (shown above)
will not be reassigned, but be left as they currently are.

Also, we will make /NP to be the default setting (unless you want
a full XCOPY-compatibility in filename matching (by /NP0).

====================================================================

Please give us your feedback on this issue. I want as many of
you to respond to the following questions:

1 [ ] I want current XXCOPY's switch left as is (/EX/SC1/SC3)
[ ] I want full XCOPY-compatibility (reassign /EX/SC1/SC3/X/Z)
[ ] I don't know the issue very well.

2 [ ] I want /NP (precise-name matching) to be the default.
[ ] I want /NP0 (XCOPY-compatible behavior) to be the default.
[ ] I don't know the issue very well.

=====================================================================

Kan Yabumoto



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